Reversible reinforced concrete and asphalt composition paving-flag



F. G. JORDAN.

REVERSIBLE REINFORCED CONCRETE AND ASPHAL COMPOSITIUN PAVING FLAG.

APPLICATION FILED FEB. 2H. i919. 1,326,741. Patented Dec. 30,1919.

2 SHEETS-SHEET l.

F. G. JORDAM 4REVERSIBLE REINFORCED CONCRETE AND ASPHALT COMPOSITION PAVING FLAG.

APPLICATION FILED FEB. 28 |919.

Patented Deo. 30,1919.

2 SHEETSSHEET 2 sel UNITED STATES vPATENT OFFICE'.

FREDERICK G. JORDAN, 0F CEMENT, WASHINGTON.

Specification of Lettes Patent.

Patented Dec. 30, 1919.

Application led February 28, 191.9. Serial No. 279,777.

To all Iwhom t may concern:

Be it known that I, FREDERICK G. JORDAN, a citizen of the United States, residing at (lement, lVashington, have invented certain new and useful Improvements in Reversible Reinforced Concrete and Asphalt Composition Paving-Flags, of which the following is a specification.

This invention relates to reversible reinforced pavingflags, slabs or blocks composed of concrete and asphalt, and having double faced `non-slipping tread surfaces, such as shown and described in my appli cation entitled Machine for manufacturing pavingflags. filed April '29th, 1919, Serial No. 293,435, and allowed Oct.. 15th, 1919.

The prime object of the invention is to furnish reversible truss-reinforced paving units as slabs, blocks or flags of minimum weight composed of such material as concrete or cement, asphaltic composition or other substance of light weight as a complete unit or article of manufacture, and affording non-slipping surfaces.

A further object of the invention is to provide paving flags composed of different compositions or material molded or pressed with metallic ties or truss and affording nonslipping surfaces onboth sides of the iags.

A still further object of the invention is to provide reversible iags composed of a plurality of moldable material having metallic truss-forming webs molded therein and .forming a composite or unitary paving flag. A

An object still further of the invention is to provide a factory made slab, flag or tile,

comprising reinforced concrete and geometricshaped fillings -or sections constituting composite parts of the slab or-tile and forming non-slippin tread surfaces on both sides of the slab or ag.

An object still further.,of the invention is to provide a novel and peculiar reinforcing truss of light Weightada ted to be molded in and with a paving sla or flag preparatory to utilizing or setting the slabsy into a floor or pavement, and to furnish a peculiar tie bracket or support for holding and locking the truss members at anangle to eac-h other.

Itis common to employ transparent fillings in connection with slabs or vault covers, and it is well known that pavements, roadways, blocks, and steps have had non-sli ping surfaces applied thereto, but these o not embody a non-slipping element or inaterial molded together with and constituting a composite part of a slab or flag so that the latter is reversible, thereby affording utility of either face thereof `as a tready surface, nor do the saidwell known devices aim at the relative weight of the materials of'which they are composed, nor do said devices comprise a reversible truss-reinforced slab or flag composed Ventirely of concrete or cement. and asphaltic or other material forming-non-slipping surfaces on opposite sides of the slab.

Various other objects, advantages, and improved results in the construction and combination of elements will be found in the invention now to be described in detail.l

In the accompanying drawings forming part of this application:

Figure 1 is a surface view of a slab or Hag embodying the invention.

Fig. 2 is a similar view, partly broken away, showing the same truss with different forms of non-slipping slab members.

Fig. 3 is a perspective View of part of a molding frame showing the truss and block therein.

Fig. et is an enlarged section view of part of a slab taken on the dotted line A-A Fig.` 1.

Fig. 5 is a similar sectionI of art of a slab taken on the dotted line B- Fig. 2.

Fig. 6 is a perspective view of one of the `truss tie clips or supporting brackets.

L Fig. 7 isa similar view showing this clip reversed. its blank, and a pair of truss Webs. Figs. 8 and 9 showing modifications of the brackets and their blanks. Fig. 1() is a surface view of part of a slab showing a modified or diagonal form of truss and non-slipping treads.

Fig. 11 is a sectional View of part of a flag or slab showing a further modification and Without the clips.

In carrying out my invention I employ a binding truss composed preferably of thin steel Webs 1 and 2 placed at an angle with respect-to each other and curved edgewise throughout their length and the length and breadth of a proposed slab or flag,` so that 'each vweb presents concaved and convexed edges perpendicular to the thickness or depth of the slab, and .the crossing of the plates forms square and oblong openings 3 and 4 as shown in Figs. 1 and .2 respectively, of the drawingsl This truss is suspended centrally in a suitable molding frame preparatory to applying the material forming the slab.

The non-slipping material may consist of asphaltio composition or any other substance or composition capable ot' being shaped or molded into non-shrinkable blocks or sections, and of such character as to form nonslipping tread surfaces for the slab, but for the purpose ot' this application l employ asphalt or asphaltic composition and mold the same into non-shrinkable blocks of var1- ously desired shape as 5 and 6, preparatory to applying them as part of a slab or flag. These blocks have lugs or tongues 7, and are of the same depth or thickness as the.

' proposed slab so as to extend through the latter from one :tace to the other, and are preferably flush With said faces. vfThese blocks as 5 and 6 are placed central of the ltruss openings 3 and el Within a molding frame as 8 and are held or temporarily anchored in such position by pins or spurs 9 projecting from the bottom of the molding frame 8. `With the truss and the sections 5 and 6 in said position, a body 10 of material as concrete, cement, or similar composition is filled into the molding frame through the truss openings and around the non-slipping blocks solas to form a composite slab, tile, or flag. Then the same is pressed, dropped, bumped, or otherwise shocked, so as to produce the' utmost density and solidity in the inished slab.

The slabs or flags may be produced complete and ready for use by a machine specially devised therefor, Which shall forni the subject of a separate patent application.

The intersection or crossing points of the truss Webs are provided with a special connecting or tie bracket having pockets shaped to conform with the shape of the webs, and said brackets or supports are preferably composed of bendable steel and comprise double forked members formed by tWo pair of vertical prongs 11 and 12 having a space forming a pocket or socket 13 between the' prongs of each pair. Said pockets or sockets are vertically opposite each other, and the prongs are connected by a bracket member 14, so that one pairof prongs is vertically opposite the socket formed by the other pair of prongs, as more clearly shown in Figs. 6 and 7. The free end of the said prongs is bendable for clenching in overlapped position over the truss members in molding the slabs soas to tie the truss members rigidly together, and to embed the Whole truss structure within the slab, leaving a body of slab material between the truss and the tread surface on each side of the slab.

The clips or tie brackets shown in Figs. 8 and 9 are as stamped out and have prongs 15 oti'set ivith respect to the prongs i6, so as to form, as iliig. 8, Wide soc-lists l? for i ,esami square truss bars 18, and as shown-in Fig. 9, itl-shaped sockets 21 for round truss rods 21, or for tubes 21h. These features hold the truss Webs opposed vertically and the free ends of these prongs will be clenched.

Referring to the modification shown in Fig. 10, the truss Webs 22 are arranged diagonally and form diamond shaped openings 23, and the non-slipping blocks 2d are dia'- mond shaped so as to present tivo tread surfaces on each it'ace or side of the slab. The same clip or tie brackets may be used in this form of slab by widening the socket enough to permit running the truss Webs diagonally therethrough.

Adverting to Fig. 5 of the drawings, it will be seen that the non-slipping blocks 25 or sectionsA are beveled from the protrusion, tongue or lug 25 thereof to each of the outer faces and the concrete or cement body 25b is wedged around and locked with said blocks so as to form a bond or fixed tie between the blocks andV the said body. Obviously the lugs or protrusions 7 and 25 are not confined to any particular shape, and the shape of the blocks may be varied as desired.

Referring to Fig. 1l of the drawings, the non-slipping tread sections 29 are conveXed or bulged at 30, or they may have ooncaved portions as 31. In this figure the truss Webs 32 are shown as engaging each other, and Without the clips or brackets.

ln order to facilitate the bonding of the body of concrete or cement with the truss, the latter may be galvanized, or dipped in a hot solution and sanded prior to being placed in a mold.

It is most desirable to produce an impervious slab of minimum Weight for the purpose or expeditious handling, transportation, and laying into pavement position. Therefore l have found such trusses as hereinbefore described, to be of the lightest attainable strength and durability. l have also found that such materials as aspbaltic (bituminous or petroleum) blocks or cores, in a degree softer than the concrete or cement body, not only affords lightness in the slab but the tread surfaces of such blocks or cores -vvill wear off sli htly lin advance of the 'tread surface osaid@7 body thereby producing slightly uneven tread surfaces which not only form a non-slipping surface ,i

but a foot hold or grip. Obviously the shape, construction and material of the truss affords a novel reinforcement of the slabs -and permits a. minimum thickness of the -slaked lime, and the like, not only produces a practical non-slipping tread on both faces ot' thcslab but refillset the Weight of the slipping material or blocks extend through slab, and by reason of the composition and combination of these materials and light steel trusses, a commercial slab or flag of standard hardness and strength is produced, .practically impervious and Aunaffected by ieat and cold or other elements to which pavements built in situ are usually exposed.

It will be understood that having the nonthe slab not only affords corresponding tread surfaces on each face ofthe slab but permits either face of the slab to be laid 1n or upon a side walk foundation or roadway bed or foundation of concrete, or Where the natural foundation is solid and Well drained, the slabs may be merely laid on a sand coated bed. There being no difference in the faces of the slabs the usual great loss of time and labor is saved in laying the same.

It will, also be understood that any one or more slabs comprising Aa pavement or walk may be removed and reversed without vdisturbing or fracturing any other remaining slab or slabs, that the slabs may be manufactured in great quantities and reserved in stock for use as desired or as occasion may demand, that the slabs maybe manufactured in standardized size or any desired size, and shape, and that the material constituting the non-slipping tread surfaces may be varied in color and design.

as desired for ornamental purposes. v

I do not wish to be understood as confining myself to any particular one or more of the materials hereinbefore mentioned, to the size, shape, or configuration of the slabs and their component parts, nor to the application of the slabs, but reserve the right to make such changes and variations in the compositions and in the truss and its tie brackets in the manufacture and practical application of the slabs and their component parts as may not be inconsistent withjthe claims to follow.

Havin thus described my invention whatl c aim as new and desire to secure by Letters Patent is:

l. As a new article of manufacture, a

reversible paving slab composed of a body of concrete, asphalt blocks having the concrete molded therebetween, and a skeleton truss comprising .arched members inter locked crosswise between saidblocks and surrounded by the concrete so as to expose both ends of the blocks for non-slipping treads.

y 2. As anew article of manufacture, a concrete slab having an open interlocked truss embedded therein, and a plurality of composition molded blocks central of the truss openings and extending through the ooncrete so as to form non-slipping treads on opposite faces of the slab.

4. A reversible paving slab composed of' a body of material such as concrete, a reinforcing truss, and a plurality of blocks composed of material as asphalt of lighter specific gravity than said body and set in said truss preparatory to molding said body therebetween so as to extend through said body for forming double faced noirslipping tread surfaces on opposite sides of the slab.

5. A reversible paving slab comprising a main body of concrete, a reinforcing truss comprising interlocked arched members inclosed by the concrete and having block openings containing portions of the concrete, and blocks held in the openings by said concreteA portions and extending through the same so as to form double faced non-slipping tread surfaces on opposite faces of the slab. 6..In a reversible paving slab or Hag, a plurality of blocks, the thickness of which shall determine the thickness of the slab, a body of concrete retaining the blocks so that their ends are exposed on opposite sides of the slab for non-slipping treads, and a metallic reinforcing truss embedded in the concrete between the blocks.

7. In a reversible paving slab or flaw, a body of concrete, a plurality of blocks held Aby the concrete so as to expose the ends of theublocks on 'opposite sides ofthe slab, metallic truss members embedded in the lchcrete and having concaved and convexed portions crossing each other, and tie brackets connecting sa-id members at their crossings.

8. The combination with a composition paving slab truss comprising a plurality of metallic bars having arched relation for sur-` f mounting and crossmg each other edgewise, -of a t1e bracket having pockets of varlous 

